<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- import CSS -->
    <link rel="stylesheet" href="js/index.css">
    <script src="js/vue.js"></script>
    <script src="js/index.js"></script>
</head>
<body>
<div id="app">






</div>
</body>

<script>
    new Vue({
        el: '#app',
        data: function() {
            return { visible: false }
        }
    })
</script>
</html>